APC Waivers and Discounts:
The Lattice Science Publication (LSP) offers waivers for Article Processing Charges (APCs) 
for articles whose corresponding authors are based in countries with lower-middle-income economies and with a 2020 gross domestic product (GDP) of less than 200 billion US dollars are eligible for a 10% discount (reference – World Bank). Please request your waiver or discount at the point of submission.

Authors can process waived-off APC from here.